
<html lang="en">

<body>
    <div class="main-1">
        <div class="rule-1">Hello, world!</div>
        <div class="rule-2">Hello, world!</div>
        <div class="rule-3">Hello, world!</div>
    </div>
    <div class="main-2">
        <div class="rule-4">Hello, world!</div>
        <div class="rule-5">Hello, world!</div>
        <div class="rule-6">Hello, world!</div>
    </div>
</body>
</html>